In this case, it really is that simple. Unlike Google, which provides a necessary service, Facebook is not necessary. I have lost nothing at all from not using Facebook. Social media might be important for advertising, but chances are that you personally really don't need Facebook.
Delete your account and go on with life. Some people might not forward you an invite to some event, but they are really not friends if they choose to do this. Writing a short email is not a big time investment. Hell, you can write one email to all your non-Facebook using friends!
I +1 you and agree with you. Its funny how people say "just dont use it". Well, I would have stopped using it have I had opportunity to educate all my friends (at once at one sit!!) that your privacy is at huge risk. But since this is impossible to happen, you keep protecting yourself as much as you can and keep "partying" with friends and family online. Its like with government. Take paying high taxes, for example. Nobody likes it but everyone has to do it, and unless everyone takes on the issue, noone can legally quit it.
Delete your account and go on with life. Some people might not forward you an invite to some event, but they are really not friends if they choose to do this. Writing a short email is not a big time investment. Hell, you can write one email to all your non-Facebook using friends!